Full Freeview on the Bluebell Hill (Medway, England) transmitter

Brian Butterworth first published this on 1st May 2004 at 08:20 - UK Free TV

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51.324,0.520 or 51°19'25"N 0°31'13"E

ME5 9RD

The symbol shows the location of the Bluebell Hill (Medway, England) transmitter which serves 200,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Bluebell Hill (Medway, England) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name

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Which Freeview channels does the Bluebell Hill transmitter broadcast?

If you have any kind of Freeview fault, follow this Freeview reset procedure first.

Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.

Mux	H/V	Frequency	Height	Mode	Watts
PSB1 BBCA	H max	C32 (562.0MHz)	242m	DTG-	20,000W
	1 BBC One (SD) South East, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 15 others
PSB2 D3+4	H max	C34 (578.0MHz)	242m	DTG-	20,000W
	3 ITV 1 (SD) (Meridian (East micro region)), 4 Channel 4 (SD) South ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV1 +1 (Meridian south coast),
PSB3 BBCB	H max	C45+ (666.2MHz)	242m	DTG-	20,000W
	56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV 1 HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others 66 TBN UK,
COM4 SDN	H max	C40 (626.0MHz)	242m	DTG-8	20,000W
	20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 Pop Player, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others
COM5 ArqA	H max	C43+ (650.2MHz)	245m	DTG-8	20,000W
	11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 9 others
COM6 ArqB	H max	C46 (674.0MHz)	245m	DTG-8	20,000W
	12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Al Jazeera Eng, plus 19 others

DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

Which BBC and ITV regional news can I watch from the Bluebell Hill transmitter?

BBC South East Today 0.8m homes 3.2%
from Tunbridge Wells TN1 1QQ, 28km southwest (219°)
to BBC South East region - 45 masts.

ITV Meridian News 0.7m homes 2.7%
from Maidstone ME14 5NZ, 5km south-southeast (156°)
to ITV Meridian (East) region - 36 masts.
All of lunch, weekend and 50% evening news is shared with all of Meridian plus Oxford

How will the Bluebell Hill (Medway, England) transmission frequencies change over time?

	1984-97	1997-98	1998-2012	2012-13	19 Jul 2018
	E	E	E	W T	W T
C21					_local
C28				_local
C32					com7
C34					com8
C39				+ArqA
C40	BBC1_waves	BBC1_waves	BBC1_waves	+BBCB	SDN
C43	ITV_waves	ITV_waves	ITV_waves	D3+4	ArqA
C45				SDN	BBCB
C46	BBC2_waves	BBC2_waves	BBC2_waves	BBCA	ArqB
C54_{tv_off}				ArqB
C55_{tv_off}					com7_{tv_off}
C56_{tv_off}					COM8_{tv_off}
C65	C4_waves	C4_waves	C4_waves

_{tv_off} Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
_waves denotes analogue; digital switchover was 13 Jun 12 and 27 Jun 12.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4	30kW
SDN, ARQA, ARQB, BBCA, D3+4, BBCB	(-1.8dB) 20kW
com8	(-7.8dB) 5kW
com7	(-8.1dB) 4.7kW
Mux 1, Mux B, Mux C, Mux D	(-10dB) 3kW
Mux 2, Mux A	(-11.8dB) 2kW

Local transmitter maps

Bluebell Hill Freeview Bluebell Hill DAB Bluebell Hill TV region BBC South East Meridian (East micro region)

Which companies have run the Channel 3 services in the Bluebell Hill transmitter area

Sep 1955-Jul 1968	Associated-Rediffusion†
Sep 1955-Jul 1968	Associated TeleVision◊
Jul 1968-Dec 1981	Thames†
Jul 1968-Dec 1981	London Weekend Television♦
Jan 1982-Dec 1992	Television South (TVS)
Jan 1993-Feb 2004	Meridian
Feb 2004-Dec 2014	ITV plc

Feb 1983-Dec 1992	TV-am•
Jan 1993-Sep 2010	GMTV•
Sep 2010-Dec 2014	ITV Daybreak•

• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Bluebell Hill was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Is the transmitter output the same in all directions?

Dave Lindsay

_{sentiment_very_satisfied}Platinum

1:33 PM

John : is now on full post- and the rest remain on their pre-switchover "low" power.

Based on the readings you have given, I am wondering if you live in a strong area, or at least your is providing a very strong to excessive signal, the latter being a possibility for C46 now and for the rest when they go up on 27th. Without knowing your location, it isn't possible to get an idea of how likely that might be the problem.

What stands out to me is that for the high-power on C46 you only have a strength of 46, yet 24 and 39, which are still on low power, are in the 80s. With the low-power signals you have ample strength so I suspect that the low strength reading for C46 is because it is excessive and requires reducing.

42 and 45 are close to 46, so perhaps latter the high power signal is acting to desensitise your when it is tuned to the formers.

This can be likened to walking down the street at night. When car headlights come towards you, your eyes become desensitised making it more difficult to see the relatively dark surroundings.

If you have a (and it is not used to split the signal to different rooms) remove it. Once you've done that, if the problem prevails, you may need attenuation to bring the level down even more.

You may find that as you reduce it, not only will the strength of C46 go up, but the of 42 and 45 will improve.

For a more in-depth explanation see ukfree.tv - independent free digital TV advice

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J

John Langley
3:54 PM

Thanks Lindsay - must say it all sounds v logical now you have explained it. We have a high (used to be on my daughter's house in poor area until she moved). We do have a multipoint to distribute to a number of rooms into which the aerial connects.

So I assume you can buy attenuators from the likes of Maplins - any suggestions as to the likely value I should purchase or can you get variable ones?

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John Langley's 3 posts

Dave Lindsay

_{sentiment_very_satisfied}Platinum

5:35 PM

John : Due to the fact that the pre- digital signals were weaker, some aerials have been replaced with higher ones. Plus the fact that with some transmitters, including , some pre-switchover digital were out of the native analogue group.

Bluebell Hill was Group E for four- analogue which covers the top two thirds of the band. All but two of the pre-switchover digital channels are in Group E, but two are below it (in the bottom third, aka Group A).

Sensitivities drop off gradually, but the fact that the weaker signals are out of group would have been likely to cause issues for some futher away. aerials may have been fitted so as to pick up the two Group A channels.

Oh, and there is no such thing as a "digital aerial" ! I presume you have a wideband aerial.

After 27th, all Bluebell's channels will be within Group E, with only one being outside of Group B (middle third) and at that it is only one channel outside, so Group Bs will probably work.

For an explanation of aerial groups, see Aerials, TV Aerial and Digital Aerial

-----

I digress.

What you don't know is if the overloading is occuring on the input of the distribution or the input to each TV or a bit of both.

If the on the input of the amp is too high for it to cope with, then it stands to reason that the outputs will be distorted. No amount of attenuation of the outputs will right the problem and no amount of reduction of amplification will right the problem.

So you need to go to square one and see what sort of level you have from the aerial by connecting directly to it.

You "may" find that there is that much signal that you replace the powered amp with a non-powered splitter.

If you still have your old aerial (the one that you replaced the current high gain one with), then that may be suitable. All channels are in group and the signal strength will be on a par with the former analogue that it used to pick up.

For more information on this subject, see www.aerialsandtv.com

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Dave Lindsay

_{sentiment_very_satisfied}Platinum

5:47 PM

John : You can attenuators up of sites like eBay. ATV also sell them.

I personally find that, since Maplin went onto the high street, its prices tend to be high and that the stuff it sells can be obtained for less from online sources.

It's good practice to use -connectors for connections that are perminant (so to speak) such as in the . Use coax connectors for behind the TV set.

Some attenuators have coax connections, some have F-connectors.

To connect a TV directly to the , connect the from it to one of the feeds to one of the rooms. Bear in mind that there will be a certain amount of loss in that cable; that is the signal coming out of the cable into the TV will be lower than that coming out of the aerial cable (in the loft) and going into the feed to the room where the TV is.

You could take a TV into the loft and try it directly.

And/or reduce the level of amplification if it has a control on it. See if this rectifies the problem.

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Transmitter engineering